Volume Converter
Convert between 11 volume units — metric and US customary. Live update.
Frequently asked questions
How many ml in a US cup?
A US cup is exactly 236.588 ml (about 237 ml for practical purposes). Note that a metric cup (used in Australia, Canada, and South Africa) is 250 ml, which is larger. UK recipes traditionally used an imperial cup of 284 ml, but this is now largely replaced by metric measurements.
What is the difference between a US and UK gallon?
A US gallon is 3.785 litres. A UK (Imperial) gallon is 4.546 litres — about 20% larger. This means that mpg figures quoted for UK cars look better than equivalent US mpg figures even for the same fuel efficiency, because the UK gallon is bigger.
How many fluid ounces in a litre?
1 litre = 33.814 US fluid ounces. A standard US fluid ounce is 29.574 ml. The UK fluid ounce is slightly different at 28.413 ml — this converter uses the US definition.
